DTS 307


DIN rail Mount / Line Powered

  • Ultra-Compact: 3.11” L x 1.38” W x 4.25” H
  • ANSI C12.20 – Revenue Grade
  • UL Listed, CE, FCC Part 15 Class B
  • BTL Listed, SunSpec certified
  • RS-485 and/or Pulse (kWh) connectivity
  • Modbus RTU or BACnet MS/TP
  • 208-480V ac L-L (CAT III) / 120-300V ac L-N (CAT III)
  • 1P 2W, 1P 3W, 3P 4W
  • 333mV or Rope CT inputs
  • Bi-directional for renewable systems (NET metering)
  • Also available in a OEM board level format

Product Description

Designed as an OEM solution, the DTS 307 is unique in that it has one of the smallest foot-prints of any submeter on the market, with dimensions of 3.11”(79mm) D x 4.25”(108mm) H x 1.38”(35mm) W.  Along with a ultra-compact DIN rail design, the DTS 307 requires no external power source to operate and comes with color coded, pluggable connectivity. This meter can function in either a single, split or three phase environment and is equipped with auto-topology detection. It is certified to ANSI C12.20 Class 0.2 (Revenue Grade) providing the most accurate data acquisition available.

The DTS 307 works with all “safe” 333mV current transformers and comes with on-board CT Reverse Algorithms for automatic correction of in-proper field mounted CTs. For remote configurability, all our DTS Series of meters are offered with our free DTS Config software platform; where you can conveniently choose from over 200 parameters at the frequency you require. The DTS Series of meters come with a User-definable Modbus register area. The DTS 307 supports these protocols, Modbus RTU and BACnet MS/TP; additionally, there is a Pulse (kWh) version.

Also, if in the future, you decide to integrate renewable energy sources, the DTS 307 will conveniently operate as a Bi-directional NET meter. The DTS 307 is SunSpec Alliance certified and easily integrates with Building Automation Systems and Energy Monitoring Software. All the DTS Series is designed and manufactured in the USA and complies with the Buy American Provisions of ARRA Section 1605.


  • Line powered single / three phase energy sub-meter with auto-topology detection
  • Ultra-Compact DIN rail design : 3.11” L x 1.38” W x 4.25” H
  • UL Listed, CE, FCC Part 15 Class B
  • Class 0.2 Energy Meter** (ANSI C12.20) – “Revenue grade”
  • 208-480 Vac (1P 2W, 1P 3W, 3P 4W)
  • Interfaces with “safe” mV and RopeCTs
  • RS-485 and/or Pulse (kWh) connectivity
  • Modbus RTU or BACnet MS/TP
  • Bi-directional for renewable systems (NET metering)
  • Color coded, pluggable connectivity
  • User configurable using DTS Config software
  • User-definable Modbus register area
  • Compatible with most Energy Management Software
  • SunSpec Alliance certified, BTL Listed
  • Designed and Manufactured in the USA. Complies with the Buy American Provisions of ARRA Section
  • Also available in a OEM board level format


Measuring Circuits

Voltage range: 208-480V ac, L-L (CAT III)
120-300V ac L-N (CAT III)
Voltage overload: 1.2 x
Voltage burden: <0.1 VA @ 280 V ac L-N
Frequency: 45 to 65 Hz
Rated current: 333 mV or model dependent
Current overload: 1.2 x
Power overload: 1.2 x


Voltage: 0.5%, <0.2% typical (80-120%)
Current: 0.5%, <0.2% typical (10-120%)
Power: 0.5%, <0.2% typical (10-120%)
Power Factor: 0.5% (between 0.5 and 1.0)
Energy:** Class 0.2 (ANSI C12.20)

Voltage Supply

Voltage: Powered from Phase A & B or Phase A & Neutral (model dependent)
Frequency: 50/60 Hz
Burden: <2VA

Low Voltage AC/DC Auxiliary Option

Voltage options: 12-24Vdc or 24Vac
Tolerance: +/- 10%
Burden: <2VA
Isolation: Must be powered from a Class 2 IEC 60950 isolated power supply

Mechanical Connection

Pluggable screw terminals suitable for 12AWG stranded wire (2.5mm2)
Case Material: Self-extinguishable, V0 plastic
Protection: Nema 1 (IP40)
Dimensions: 4.25”(108mm) H x 3.11”(79mm) D x 1.38”(35mm) W
Weight: 0.5lb (0.23 kg)


Operating temp: -4º to 158ºF (-20º to 70ºC)
Storage temp: -40º to 185ºF (-40º to 85ºC)
Humidity: 5 to 95% R.H. non-condensing

Communications (Serial)

Connection: 3 way pluggable, screw terminal
Protocols: Modbus RTU (SunSpec Certified) or BACnet MS/TP (BACnet Listed)

Pulse Output (Optional)

Type: Potential Free, N.O. Solid State Relay
Pulse Width: 100mS default
Min 50 mS, User configurable up to 10 Seconds
Max 10 Pulses per Second
Pulse Rate: 1 Pulse / 1 kWh default, User configurable
Max On-Resistance: 30 ohm
Max switching voltage: 50Vdc or 30Vac
Max switching current: 120mA (350mA for 10mS)
Connection: Isolated Pin-Pair

Standards & Safety

UL listing: E488290
Conforms to: UL Std 61010.1 3rd Edition, May 11, 2012, Revised July 15, 2015
Certified to: CAN/CSA C22.2 # 61010.1-12 3rd Edition, Revision dated July 2015, IEC 61010-2-030: 2010 (First Edition)
EMC: IEC 61326-1 (2012) Ed 2, IEC 61000-3-2, IEC 61000-3-3, IEC 61000-4-2, IEC 61000-4-3, IEC 61000-4-4, IEC 61000-4-5, IEC 61000-4-6, IEC 61000-4-8, IEC 61000-4-11
FCC: CISPR 11 Group1 Class B / FCC Part 15 Class B
Other: Measurement Category III – 300Vac L-N / 520Vac L-L

Data Sheets & Downloads


DTS 307 – Brochure (1.5 Mb) [PDF]
Right Angle Bracket Datasheet (1.3 Mb) [PDF]
Inline Fuse Kit Sheet (1 Mb) [PDF]


DTS 307 – Installation Guide (1.7 Mb) [PDF]


DTS Config — Current Version (1.5 Mb) [ZIP]

DTS Modbus Map (456.4 Kb) [PDF]
DTS Modbus Addendum (SunSpec) (215.4 Kb) [PDF]
DTS BACnet MS/TP Map (369 Kb) [PDF]

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